Home / 12,618.40-18,915.60-4,718.80

Finding the Fourth Proportional to 12,618.40, 18,915.60 and 4,718.80

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Solution

The fourth proportional to 12,618.40, 18,915.60 and 4,718.80 is: 7,073.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,618.40 : 18,915.60 = 4,718.80 : x
  2. Step 2: Convert to fraction form
    12,618.40/18,915.60 = 4,718.80/x
  3. Step 3: Cross multiply
    12,618.40x = 18,915.60 × 4,718.80
  4. Step 4: Simplify right side
    12,618.40x = 89,258,933.28
  5. Step 5: Solve for x
    x = 89,258,933.28/12,618.40
  6. Step 6: Final answer
    x = 7,073.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.